Brake Products, Inc.   16751 Hilltop Park Place
  Chagrin Falls, Ohio 44023
  Phone: (440) 543-7962
  Fax:     (440) 543-7963
  Web:   www.brakeproducts.com
  Email: sales@brakeproducts.com
Supplier of Industrial Brake Parts Since 1985
 
Download brochure in Adobe Acrobat® format (1.16MB)
 

 
TABLE OF CONTENTS
Ajax Compresi-Flex Couplings...............2
 
Compresi-Flex Type 87 & 90.................3
 
Type 87 Dimensional Information...........4
 
Type 87 Performance Information..........5
 
Type 90 Sizes 1-7...............................6
 
Type 90 Sizes 8-24.............................7
 
Type 90 Sizes 1-7
Performance Information......................8
 
Type 90 Sizes 8-24
Performance Information.....................9
 
Common Configurations....................10
 
Recommended Minimum Svc.............11
Ajax Compresi-Flex Couplings
 
Ajax Compresi-Flex Couplings provide misalignment capability for shaft connections by transmitting torque through an elastomer, which is operating in compression. The flexibility of the elastomer not only allows for radial, axial and angular misalignment, but also provides a torsionally soft connection with excellent damping capabilities.
 
Absorbs Torsional Impacts and Damps Torsional Vibration
 
The torsional flexibility of the Ajax Compresi-Flex Coupling reduces driveline shock loads and vibrations, helping the connected equipment to operate with lower dynamic loads and provide a longer operating life.
 
Fail-Safe Design Requires No Lubrication
 
The absence of metal in sliding contact means that there is no lubrication used with the Ajax Compresi-Flex Coupling.
This feature makes it ideal for installations that are difficult to access, because no routine maintenance is necessary. In the unlikely event of destruction of the elastomer, the coupling will continue to transmit torque until servicing is possible.
 
Variable Stiffness and Zero Backlash
 
The design of the Ajax Compresi-Flex Coupling allows the use of different hardness elastomers, which provides the opportunity to “tune” the stiffness of the coupling and optimize performance of the drive system. The elastomer blocks are also preloaded, to eliminate all backlash. This removes any contribution to the Torque Amplification Factor (TAF) from the coupling.
 
Install it and forget about it!
 
2

 
Compresi-Flex Type 87
 
The Type 87 Compresi-Flex Coupling uses cylindrical blocks that are most commonly supplied in a polyurethane compound. It can be installed where a gear or grid type is currently operating, and eliminate the need for periodic greasing.
 
Typical applications include:
  • Run-out tables
     
  • Crane drives
     
  • Manipulators
     
  • Conveyors
     
  • Pinch rolls/feed rolls
Compresi-Flex Type 90
 
The Type 90 Compresi-Flex uses modified cylindrical blocks that are available in polyurethane or various rubber compounds. It is used in heavy-duty applications to provide maximum protection from severe shock loads.
 
Typical applications include:
  • Main mill drive motor couplings
     
  • Intermediate spacer couplings
     
  • Jack shafts
     
  • Crop shears
3

 
Compresi-Flex Type 87
Full Coupling
Flex Half

 
Dimensions, Weight, Inertia, & Misalignment Capability
COUPLING SIZE 1.5 2 2.5 3 3.5 4 5 6
DIMENSIONS (in) A 7.87 9.37 10.25 12.13 14.13 18.37 20.00 22.75
B 4.13 4.87 5.37 6.87 7.63 9.19 10.25 11.25
C 0.13 0.13 0.13 0.13 0.13 0.19 0.25 0.25
ER 2.00 2.37 2.63 3.37 3.75 4.50 5.00 5.50
E 2.00 2.37 2.63 3.37 3.75 4.50 5.00 5.50
G 3.13 4.00 4.75 6.00 7.25 8.75 11.00 13.00
F 7.00 8.37 9.25 11.00 12.75 17.25 18.50 21.13
D 6.16 7.34 8.27 9.88 11.61 14.25 17.13 19.74
T 0.50 0.63 0.69 0.75 0.75 0.75 0.87 1.00
J (5)-M8 (6)-M8 (6)-M10 (6)-M10 (6)-M12 (6)-M12 (7)-M12 (8)-M12
H (6)-M8 (6)-M10 (8)-M10 (8)-M12 (10) M-12 (16)-M12 (12)-M16 (12)-M16
MAX. BORE 1.97 2.56 3.15 3.74 4.53 551 6.69 8.27
MIN. BORE 1.18 1.57 1.57 2.17 2.17 2.76 3.15 3.54
POLYURETHANE BLOCKS PER CAVITY 1 1 1 1 1 1 1 1
PER COUPLING 10 12 12 12 12 12 14 16
WEIGHT1
(Ib)		 INNER ELEMENT 6.39 12.83 17.59 31.53 53.35 85.54 14.91 244.7
OUTER ELEMENT 8.58 13.73 17.79 30.20 41.23 76.06 96.78 129.6
RIGID FLANGE 9.48 17.42 24.03 40.34 69.00 108.0 172.0 262.4
INERTIA1
(lb ft2)		 INNER ELEMENT 0.12 0.39 0.73 1.69 4.22 9.73 24.68 56.95
OUTER ELEMENT 0.53 1.28 2.18 5.32 9.21 25.98 50.78 78.78
RIGID FLANGE 0.39 1.14 1.69 3.87 7.50 20.88 39.87 80.68
ALLOWABLE MISALIGNMENT2
RADIAL (in) 0.03 0.03 0.03 0.04 0.06 0.06 0.06 0.06
AXIAL (in) 0.06 0.06 0.06 0.06 0.06 0.08 0.12 0.12
ANGULAR (degree) 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
4

 
Type 87 Performance Information
 
Polyurethane Blocks
COUPLING SIZE
1.5
2
2.5
3
3.5
4
5
6
NOMINAL TORQUE TKN (in Ib)
3337
6054
9338
18370
29000
54330
97270
138600
MAXIMUM TORQUE Tmax(in lb)
10010
18160
28010
55120
87010
162900
291800
415800
VIBRATORY TORQUE TKW (in Ib)
708.1
1151
1770
3363
5310
9736
17700
26550
MAXIMUM SPEED1 (rpm)
6000
5000
4500
4000
3300
2800
2500
2100
DYNAMIC TORSIONAL
STIFFNESS (*103 in Ib/rad)
@ 0.25 TKN
0.1505
0.2300
0.3451
0.6815
1 062
1.982
3.558
5.302
@ 0.55 TKN
0.1416
0.2213
0.3275
0.6461
1.018
1.903
3.408
5.081
@ 0.75 TKN
0.1594
0.2478
0.3718
0.7346
1.151
2.150
3.859
5.744
@ 1.00 TKN
0.2124
0.3276
0.4868
0.9647
1.513
2.832
5.071
7.559
RADIAL STIFFNESS
(*103 lb/in)
12.63
17.99
19.41
26.32
28.55
35 @57
46.68
59.21
AXIAL STIFFNESS
(*103 lb/in)
5.40
7.54
8.45
11.08
12.28
15.07
19.70
24.90
1 For speeds in excess of 80% of maximum, balancing is recommended.
 
When sizing, please refer to the recommended minimum service factors on page 11. The maximum torque allowable is three times the nominal torque. This should be the highest torque value expected during normal drive conditions, eg. start up or passing through critical speeds. Exceptional shock loads may be allowed up to three times the quoted maximum torque value.
 
The allowable vibratory torque values given here apply at a frequency of 10 Hz. Allowable vibratory torques at other frequencies may be calculated using the formula:
 
 SF
Correction Factor


FREQUENCY (Hz)
TAV = Catalog Tkw x SQRT(10/F)

 
The dynamic torsional stiffness depends upon the effective frequency and vibratory torque. The listed dynamic torsional values are based upon measurements taken at an ambient temperature of 77o F, frequency of 10 Hz and the listed vibratory torques.
 
To obtain greater accuracy of torsional stiffness, the quoted value may be corrected by factors taken from the graphs, compensating for actual frequency and vibratory torque.
 
Actual Dynamic Stiffness = Catalog dyn. x SF x SV
 SV

PERCENTAGE TKW
5

 
Type 90 Dimensional Information
sizes 1-7
Flex-Rigid (Sizes 1-7)
Flex Half

 
Dimensions, Weight, Inertia, & Misalignment Capability
COUPLING SIZE
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
7
DIMENSIONS
(in)		 A
7.37
8.50
10.25
10.24
11.89
13.31
15.43
17.32
19.29
22.36
25.12
28.66
B
4.33
5.12
5.63
6.89
7.60
8.72
10.0
11.44
12.95
14.86
17.03
19.17
C
0.08
0.08
0.12
0.12
0.12
0.14
0.16
0.18
0.20
0.22
0.26
0.28
ER
2.13
2.52
2.76
3.39
3.74
4.29
4.92
5.63
6.38
7.32
8.39
9.45
E
2.13
2.52
2.76
3.39
3.74
4.29
4.92
5.63
6.38
7.32
8.39
9.45
G
3.62
4.25
4.80
5.31
5.83
6.61
7.68
8.66
9.92
11.42
12.99
14.69
F
6.75
7.75
9.25
9.45
10.87
12.28
14.17
16.02
18.03
20.79
23.54
26.77
D
6.18
7.13
8.70
8.74
9.65
11.02
12.60
14.45
16.46
18.86
21.57
24.41
T
0.43
0.47
0.57
0.43
0.53
0.55
0.63
0.73
0.83
0.94
1.04
1.22
J
(5)-M8
(6)-M8
(6)-M8
(8)-M8
(8)-M10
(8)-M12
(8)-M16
(8)-M16
(8)-M16
(8)-M20
(8)-M20
(8)-M24
H
(8)-M8
(8)-M8
(8)-M8
(12)-M8
(12)-M12
(12)-M12
(12)-M16
(12)-M16
(16)-M16
(12)-M20
(16)-M20
(16)-M24
K
1.54
1.81
2.36
3.19
3.50
4.02
4.65
5.28
6.01
6.85
7.87
8.90
MAX. BORE
2.01
2.52
2.87
3.35
3.74
4.29
4.92
5.63
6.38
7.32
8.39
945
MIN. BORE
1.06
1.38
1.46
2.05
2.60
2.83
3.15
3.62
4.13
4.72
5.51
6.30
RUBBER
BLOCKS		 PER CAVITY
1
1
1
1
1
1
1
1
1
1
2
2
PER COUPLING
10
12
12
16
16
16
16
16
16
16
32
32
WEIGHT1
(Ib)		 INNER MEMBER
6.17
9.92
15.21
19.62
25.61
39.10
59.51
88.56
131.1
197.2
290.9
421.2
OUTER MEMBER
6.39
10.14
13.22
14.44
24.07
34.96
54.20
77.89
111.2
171.5
246.8
364.2
RIGID FLANGE
9.48
14.55
22.04
23.89
33.37
46.81
72.80
105.4
152.8
230.6
334.5
490.2
INERTIA1
(Ibft2)		 INNER MEMBER
0.09
0.19
0.43
0.62
1.19
2.40
4.82
9.30
17.94
35.38
68.15
126.5
OUTER MEMBER
0.33
0.45
1.16
1.71
3.54
6.48
13.29
24.70
45.04
91.77
170.6
324.6
RIGID FLANGE
0.31
0.59
1.19
1.38
2.75
4.60
9.63
17.75
31.92
64.52
117.6
227.0
ALLOWABLE MISALIGNMENT2
RADIAL (in)
0.03
0.03
0.05
0.06
0.06
0.06
0.06
0.07
0.08
0.09
0.11
0.13
AXIAL (in)
0.05
0.05
0.05
0.05
0.06
0.07
0.08
0.09
0.10
0.11
0.13
0.14
ANGULAR (degree)
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
1 Weights and inertias are calculated at the minimum bore size.
2 All allowable misalignments can be tolerated simultaneously.
6

 
Type 90 Dimensional Information
sizes 8-24
Full Coupling: Size 8 to 11
Full Coupling: Size 12 to 24

 
Dimensions, Weight, inertia, & Misalignment Capability
COUPLING SIZE
8
9
10
11
12
14
16
18
20
24
DIMENSIONS
(in)		 A
31.42
36.42
41.93
47.05
46.85
52.36
58.66
66.34
75.79
87.01
B
21.42
24.53
27.97
31.97
40.31
45.59
50.83
58.19
66.34
75.91
C
0.31
0.35
0.41
0.47
0.45
0.49
0.55
0.65
0.73
0.85
ER
10.55
12.09
13.78
15.75
17.91
20.28
22.60
25.87
29.49
33.74
E
10.55
12.09
13.78
15.75
17.91
20.28
22.60
25.87
29.49
33.74
G
16.34
18.70
21.34
24.41
27.80
31.42
35.00
40.08
45.67
52.28
F
29.53
34.06
39.06
44.17
44.88
50.39
56.30
63.98
73.03
83.66
T
1.32
1.42
1.69
2.05
1.04
1.32
1.42
1.42
1.69
2.05
J
(12)-M24
(12)-M30
(12)-M36
(24)-M36
(32)-M24
(32)-M24
(32)-M30
(32)-M30
(32)-M36
(32)-M42
H
(20)-M24
(20)-M30
(20)-M36
(24)-M36
(32)-M24
(32)-M24
(32)-M30
(32)-M30
(32)-M36
(32)-M42
K
9.92
11.36
12.91
14.80
22.40
25.31
28.23
32.32
36.85
42.17
MAX. BORE
10.55
12.09
13.78
15.75
17.91
20.28
22.60
25.87
29.49
33.74
MIN. BORE
6.57
7.56
9.13
11.10
-
-
-
-
-
-
RUBBER PER CAVITY
2
2
2
2
4
4
4
4
4
4
BLOCKS PER COUPLING
32
32
32
32
64
64
64
64
64
64
WEIGHT (Ib) INNER MEMBER
578.27
857.60
1239.9
1793.0
2556.3
2739.2
5223.8
7693.0
11607
16987
OUTER MEMBER
588.15
912.71
1396.4
2004.2
1118.8
2340.2
3268.4
5003.4
7063.6
10337
RIGID FLANGE
655.65
964.08
1435.6
2087.1
2094.4
2991.7
3187.9
4488.6
9182.2
13774
INERTIA (Ibft2) INNER MEMBER
216.90
424.30
807.55
1555.3
4912.2
6490.3
12957
25249
47840
94779
OUTER MEMBER
683.44
1407.2
2835.8
5225.4
4081.6
9978.6
17418
34622
63431
123493
RIGID FLANGE
364.26
709.30
1439.49
2745.6
2657.8
4864.7
5552.9
14119
31300
61627
ALLOWABLE MISALIGNMENT
RADIAL(in)
0.14
0.15
0.18
0.20
0.20
0.21
0.24
0.28
0.31
0.37
AXIAL (in)
0.16
0.18
0.21
0.24
0.23
0.25
0.28
0.32
0.36
0.42
ANGULAR (degree)
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
7

 
Type 90 Performance Information
sizes 1-7
 
COUPLING SIZE 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 7
NOMINAL TORQUE TKN (*103 in Ib) 1.974 3.806 8.851 17.70 23.60 35.40 53.10 79.66 118.0 177.0 265.5 383.5
MAX. TORQUE Tkmax (*103 in Ib) 5.930 11.51 26.55 53.10 70.81 106.2 159.3 239.0 354.0 531.0 796.6 1151
VIB. TORQUE1 TKW (*103 in Ib) 0.7435 1.443 3.319 6.638 8.851 13.28 19.91 29.87 44.25 66.38 99.57 143.8
MAXIMUM SPEED (rpm) 6300 5400 4500 4480 3860 3450 2975 2650 2380 2050 1830 1600
DYNAMIC TORSIONAL2
STIFFNESS (*106 in Ib/rad)
@ 0.25 TKN R 50 0.035 0.097 0.230 0.673 0.894 1.345 2.018 3.026 4.487 6.726 10.090 14.592
R 60 0.044 0.106 0.257 0.919 1.230 1.841 2.761 4.142 6.133 9.204 13.800 19.932
R 70 0.071 0.159 0.381 1.310 1.744 2.620 3.929 5.894 8.735 13.092 19.644 28.380
R 80 0.115 0.265 0.637 1.699 2.266 3.398 5.098 7.646 11.328 16.992 25.488 36.816
@0.5TKN R 50 0.062 0.150 0.354 0.973 1.301 1.946 2.921 4.381 6.487 9.734 14.592 21.084
R 60 0.071 0.168 0.407 1.310 1.744 2.620 3.929 5.894 8.735 13.092 19.644 28.380
R 70 0.089 0.221 0.513 1.752 2.336 3.504 5.257 7.885 11.682 17.520 26.280 37.956
A 80 0.133 0.319 0.761 2.284 3.044 4.567 6.850 10.274 15.216 22.836 34.248 49.476
@ @0.75 TKN R 50 0.089 0.221 0.531 1.452 1.938 2.903 4.354 6.532 9.673 14.508 21.768 31.440
R60 0.106 0.257 0.611 1.946 2.593 3.894 5.842 8.761 12.972 19.464 29.196 42.180
R 70 0.124 0.292 0.690 2.513 3.354 5.027 7.541 11.310 16.752 25.128 37.704 54.456
A 80 0.159 0.381 0.903 4.546 4.460 6.691 10,036 15.048 22.296 33.456 50.184 72.480
@ 1.0TKN R 50 0.150 0.336 0.797 2.302 3.071 4.602 6.902 10.355 15.336 23.016 34.512 49.848
A 60 0.159 0.381 0.903 2.832 3.779 5.664 8.496 12.744 18.876 28.320 42.480 61.356
A 70 0.159 0.389 0.929 3.504 4.673 7.009 10.514 15.768 23.364 35.040 52.572 75.936
R 80 0.186 0.451 1.080 4.832 6.443 9.665 14.496 21.744 32,20 848.324 72.48 104.700
RADIAL STIFFNESS
(*103 lb/in)		 R 50 3.83 6.23 10.4 23.2 25.6 29.3 33.6 38.4 43.8 50.2 57.4 64.9
R 60 4.13 7.08 11.7 28.7 31.6 36.3 41.5 47.5 52.4 62.0 71.0 80.3
A 70 6.45 11.1 18.5 48.2 53.1 60.8 69.6 79.7 90.9 104 119 135
R 80 10.4 17.8 29.6 67.6 74.5 85.3 97.8 112 128 146 167 189
AXIAL STIFFNESS
(*103 lb/in)		 H 50 2.63 3.59 4.34 4.65 5.12 5.86 6.72 7.69 8.77 10.0 11.5 13.0
R 60 2.87 4.08 5.54 7.52 8.29 9.49 10.9 12.4 14.2 16.2 18.6 21.0
R 70 4.73 6.74 9.19 10.1 11.2 12.8 14.7 16.8 19.1 21.9 25.1 28.3
R 80 6.62 9.54 12.7 16.9 18.6 21.3 24.4 28.0 31.9 36.5 41.8 47.2
1 At 10 Hz only, allowable vibratory torque at higher or lower frequencies fe = Vib. Torque *SQRT(10 Hz/fe)
 
2 These values apply to conditions of low amplitude, steady vibration at a mean torque.
Consult Renold Ajax Couplings for values applying to high amplitude transient vibration.
 
When sizing, please refer to the recommended minimum service factors on page 11. The maximum torque allowable is three times the nominal torque. This should be the highest torque value expected during normal drive conditions, eg. start up or passing through critical speeds. Exceptional shock loads such as “short circuit” torques may be allowed up to three times the quoted maximum torque value.
8

 
Type 90 Performance Information
sizes 8-24
 
COUPLING SIZE
8
9
10
11
12
14
16
18
20
24
NOMINAL TORQUE TKN (*103 in lb)
530.0
800.0
1180
1770
2655
3830
5310
7965
11800
17700
MAX. TORQUE TKmax (*103 in Ib)
1590
2390
3540
5310
7965
11500
15900
23900
35400
53100
VIB. TORQUE1 TKW (*103) in Ib)
200.0
298.7
442.5
663.8
995.7
1438
1991
2987
4425
6638
MAXIMUM SPEED(rpm)
1460
1260
1090
975
975
860
770
680
600
520
DYNAMIC TORSIONAL2
STIFFNESS (*106 in Ib/rad)
@ 0.25 TKN R50
20.18
30.27
44.85
67.26
-
-
-
-
-
-
R 60
27.61
41.43
61.36
92.04
-
-
-
-
-
-
R 70
39.29
58.95
87.33
130.98
71.70
103.55
143.38
215.05
318.60
477.90
R 80
50.98
76.46
113.28
169.92
83.63
120.80
167.26
251.34
371.70
557.54
@ 0.5 TKN R 50
29.21
43.82
64.90
97.35
-
-
-
-
-
-
R 60
39.29
58.95
87,33
131.0
-
-
-
-
-
-
R 70
52.57
78.85
116.8
175.2
103.6
149.6
207.1
310.6
460.2
690.3
R 80
68.50
102.7
152.2
228.3
143.4
207.1
286.7
430.1
637.2
955.8
@ 0.75TKN R 50
43.54
65.33
96.74
145.1
-
-
-
-
-
-
R 60
58.41
87.61
129.8
194.7
-
-
-
-
-
-
R70
75.40
113.1
167.5
251.3
153.1
221.3
307.1
460.2
681.5
1022
R 80
100.4
150.5
223.0
334.5
185.0
267.3
370.8
555.8
823.1
12360
@ 1.0TKN R 50
69.03
103.5
153.4
230.1
-
-
-
-
-
-
R 60
84.96
127.4
188.8
283.2
-
-
-
-
-
-
R 70
105.1
157.7
233.6
350.5
208.9
301.8
417.7
627.5
929.26
1392
R 80
145.0
217.4
322.1
483.2
237.2
342.5
473.5
710.7
1053
1584
RADIAL STIFFNESS
(*103 lb/in)		 R 50
72.4
82.8
94.4
108
-
-
-
-
-
-
R60
89.5
102
117
134
-
-
-
-
-
-
R70
150
172
195
224
161
182
203
232
265
397
R80
210
241
275
314
263
297
33'
379
432
649
AXIAL STIFFNESS
(*103 lb/in)		 R 50
14.5
16.6
18.9
21.6
-
-
-
-
-
-
R 60
89.5
102
117
134
-
-
-
-
-
-
R 70
31.6
36.1
41.2
47.2
7.05
7.97
8.88
10.2
11.6
17.4
R 80
52.6
60.3
68.7
78.6
11.2
12.7
14.1
16.2
18.5
27.7
1 At 10 Hz only, allowable vibratory torque at higher or lower frequencies fe = Vib. Torque *SQRT(10 Hz/fe)
 
2 These values apply to conditions of low amplitude, steady vibration at a mean torque.
Consult Renold Ajax Couplings for values applying to high amplitude transient vibration.
9

 
Common Configurations
 
Limited End Floating Coupling

 
Type 90 Coupling with Spacer

 
Floating Shaft Assembly

 
10

 

 
Recommended Minimum
Service Factors
Bar Mill
2.0
Blooming Mill
3.0
Coiler
2.5
Cold Mill
2.0
Draw Beach
2.0
Edger Drive
2.5
Feed Rolls
3.0
Furnace Pusher
2.5
Hot Mill-Finishing
2.5
Hot Mill-Roughing
3.5
Ingot Car
2.0
Manipulator
3.0
Piercer
3.0
Reel Drives
2.0
Runout Table
2.0
Saw Drive
2.0
Slitter
1.5
Wire Drawing
2.0

 

 
11